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1 //===- InputSection.cpp ---------------------------------------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #include "InputSection.h"
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10 #include "OutputSegment.h"
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11 #include "Symbols.h"
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12 #include "Target.h"
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13 #include "lld/Common/Memory.h"
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14 #include "llvm/Support/Endian.h"
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15
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16 using namespace llvm::MachO;
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17 using namespace llvm::support;
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18 using namespace lld;
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19 using namespace lld::macho;
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20
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21 std::vector<InputSection *> macho::inputSections;
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22
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23 uint64_t InputSection::getFileOffset() const {
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24 return parent->fileOff + outSecFileOff;
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25 }
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26
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27 uint64_t InputSection::getVA() const { return parent->addr + outSecOff; }
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28
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29 void InputSection::writeTo(uint8_t *buf) {
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30 if (!data.empty())
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31 memcpy(buf, data.data(), data.size());
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32
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33 for (Reloc &r : relocs) {
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34 uint64_t va = 0;
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35 if (auto *s = r.target.dyn_cast<Symbol *>()) {
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36 if (auto *dylibSymbol = dyn_cast<DylibSymbol>(s)) {
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37 va = target->getDylibSymbolVA(*dylibSymbol, r.type);
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38 } else {
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39 va = s->getVA();
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40 }
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41 } else if (auto *isec = r.target.dyn_cast<InputSection *>()) {
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42 va = isec->getVA();
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43 }
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44
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45 uint64_t val = va + r.addend;
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46 if (r.pcrel)
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47 val -= getVA() + r.offset;
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48 target->relocateOne(buf + r.offset, r.type, val);
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49 }
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50 }
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